/*
 * Copyright (c) 2009, Jeremy Sandell
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the author nor the names of its contributors
 *       may be used to endorse or promote products derived from this software
 *       without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <hl7/common.hpp>

namespace hl7 {
    namespace util {
        std::vector<std::string> split(const std::string str,
                                       const std::string delim)
        {
            using namespace pcrepp;
            Pcre re(delim, "g");
            std::vector<std::string> splitted = re.split(str);
            return splitted;
        }

        std::vector<std::string> & split(const std::string &in,
                                         const char &delim,
                                         std::vector<std::string> &sv)
        {
            int i = 0;
            int j = in.find(delim);

            while (j >= 0)
            {
                sv.push_back(in.substr(i, j-i));
                i = ++j;
                j = in.find(delim, j);

                if (j < 0) 
                    sv.push_back(in.substr(i, in.length( )));
            }
            return sv;
        }

        std::vector<std::string> & split(const std::string &in,
                                         const std::string &delim,
                                         std::vector<std::string>& sv)
        {
            return split(in, delim.c_str()[0], sv);
        }

        inline std::string tolower(const std::string& input_string)
        {
            std::string str = input_string;

            /* iterate through all the characters.  If uppercase,
             * convert to lowercase. 
             */
            for (std::string::size_type i = 0;
                 i < str.length();
                 ++i)
                if (isupper(str[i]))
                    str[i] |= 32;

            return str;
        }

#ifdef UNSTABLE
        /* \fn join
         * \brief Joins a vector of T, using delimiter of string d.
         * \param vector<T>
         * \param string d
         * \returns std::string of joined T, delimited with d.
         */
        template<typename T> std::string join(typename std::vector<T> &v, std::string &d)
        {
            std::string s;
            for(typename std::vector<T>::iterator iter = v.begin();
                iter != v.end();
                iter++)
            {
                s.append((*iter));
                if(iter != v.end() - 1)
                    s.append(d);
            }
            return s;
        };
#else
        /* \fn join
         * \brief Joins a string vector, using delimiter of string d.
         * \param vector<string> v - vector to join.
         * \param string d - delimiter to use.
         *
         * \returns string, delimited with d.
         */
        std::string join(std::vector<std::string> &v, std::string &d)
        {
            std::string s;
            for(std::vector<std::string>::iterator iter = v.begin();
                iter != v.end();
                iter++)
            {
                s.append((*iter));
                if(iter != v.end() - 1)
                    s.append(d);
            }
            return s;
        };

#endif
        std::string & rtrim(std::string &s, char c) 
        {
            if (!s.empty())
            {
                std::string::iterator p;
                for (p = s.end(); p != s.begin() && *--p == c;);

                if (*p != c)
                    p++;

                s.erase(p, s.end( ));
            }

            return s;
        }
    };
};
